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Analysis Tool on Soil Liquefaction Potential
for Housing Land
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2014.9.22
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Ministry of Land, Infrastructure, Transport and Tourism, Government of Japan
City Bureau/ National Institute for Land and Infrastructure Managemenｔ
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　This software is developed by the National Institute for Land and Infrastructure Management (NILIM) to help calculating the secondary evaluation index presented in “Technical Guidance for Estimating Liquefaction Potential of Housing Lands (in Japanese)” provided from the Ministry of Land, Infrastructure, Transport and Tourism (MLIT), Government of Japan.
　The Technical Guidance is designed to estimate the potentiality of damage to housing lands due to soil liquefaction caused by moderate seismic ground motions.
　Soil liquefaction is complex phenomenon affected by many conditions, such as ground motion characteristics, local geology, and building properties at a site. Thus, it is too expensive and time-consuming to estimate the liquefaction damage potentials accurately considering such all conditions stated previously. In use of this software, therefore, please note the technical limitations as follows:
(1) The level of earthquake ground motion is assumed to be that with the JMA (Japan Meteorological Agency) Seismic Intensity (IJMA) scale 5 or equivalent.
(2) The computed results should be used only for a guide to evaluate the liquefaction potential of housing areas, not for any guarantee to detect the liquefaction damage at an individual house.
Based on the geotechnical experiences, further suggestions should be made:
(3) The SPT(Standard Penetration Test)-N value and fines content of sandy soil, i.e., the input parameters in the calculation, are assumed to be those derived from the Japanese-style geotechnical investigations. When use the parameters from your country-style surveys, please correct their values appropriately for the Japanese ones equivalent.
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InputThe spreadsheet is provided to enter ground condition used for evaluation of liquefaction potential.
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PresentationThe spreadsheet presents graphic summary of liquefaction potential based on input criteria.
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Calculation (Arch.)The spreadsheet calculates liquefaction potential based on “the Recommendation for the Design of Building Foundations” (Architectural Institute of Japan, 2000) (herein after referred to as Arch.). It is intended only to present the calculated value; thus, you do not need to enter any values.
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Calculation (Road.)The spreadsheet calculates liquefaction potential based on“Specifications for highway bridges and commentaries (Volume V, Earthquake resistant design)” (Japan Road Association, 1990) (herein after referred to as Road.).. It is intended only to present the calculated value; thus, you do not need to enter any values.
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GuidanceCalculation procedures are provided in the spreadsheet.
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GuidelineThe spreadsheet includes "Technical guideline for evaluating liquefaction potential in residential area” provided by the Ministry of Land, Infrastructure and Transport Metropolitan Branch.
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Note: Please make sure to enable Macros in Excel before use.
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